public class Example30 {
    public static void main(String[] args) {
        int[][] arr =new int[3][];
        arr[0] =new int[] {11,12};
        arr[1] =new int[] {21,22,23};
        arr[2] =new int[] {31,32,33,34};
        int sum=0;
        for (int i=0;i<arr.length;i++){
            int groupSum=0;
            for (int j=0;j<arr[i].length;j++){
                groupSum =groupSum+arr[i][j];
            }
            sum=sum+groupSum;
            System.out.println("第"+(i+1)+"小组销售额为："+groupSum+"万元。");
        }
        System.out.println("总销售额为："+sum+"万元。");
    }
}
